CSS透明边框

Question

我正在尝试制作透明边框。我尝试了transparent和rgba。

Example fiddle link

.menu-item {
  display: block;
  width: 100%;
  list-style: none;
  text-align: left;
  line-height: 20px;
  font-size: 13px;
  padding: 5px 10px !important;
  margin: 0 !important;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  border-bottom: 5px solid transparent !important; 
  //border-bottom:5px solid rgba(0,0,0,0);
  cursor: pointer;
  background: #1a1a1b;
  color: #ccc;
  text-decoration: none !important;
  white-space: nowrap;
  box-shadow: none !important;
}

<ul class="menu">
  <li class="menu-item">Disabled</li>
  <li class="menu-item">English</li>
  <li class="menu-item">German</li>
  <li class="menu-item">Spanish</li>
</ul>

Answer 1

仅使用边距代替边框-边框是透明的，但是您应用了背景以使其透彻显示。

还有一个小技巧-当您无法覆盖某些插件的内联样式时，!important应该用作最后的选择-自由使用它的方式，您的代码将很快变得难以维护

.menu-item {
  display: block;
  width: 100%;
  list-style: none;
  text-align: left;
  line-height: 20px;
  font-size: 13px;
  padding: 5px 10px;
  margin: 0 0 5px 0;
  box-sizing: border-box;
  cursor: pointer;
  background: #1a1a1b;
  color: #ccc;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: none;
}

<ul class="menu">
  <li class="menu-item">Disabled</li>
  <li class="menu-item">English</li>
  <li class="menu-item">German</li>
  <li class="menu-item">Spanish</li>
</ul>

Answer 2

您需要更改background-clip以避免背景延伸到边界：

.menu-item {
  display: block;
  width: 100%;
  list-style: none;
  text-align: left;
  line-height: 20px;
  font-size: 13px;
  padding: 5px 10px !important;
  box-sizing: border-box;
  border-bottom: 5px solid transparent;
  cursor: pointer;
  background: #1a1a1b;
  background-clip:padding-box; /* add this*/
  color: #ccc;
}

<ul class="menu">
  <li class="menu-item">Disabled</li>
  <li class="menu-item">English</li>
  <li class="menu-item">German</li>
  <li class="menu-item">Spanish</li>
</ul>

Answer 3

如果您希望使用边框底线，则可以使用以下代码：

.menu-item {
  display: block;
  width: 100%;
  list-style: none;
  text-align: left;
  line-height: 20px;
  font-size: 13px;
  padding: 5px 10px !important;
  margin: 0 !important;
 -webkit-box-sizing: border-box;
 -moz-box-sizing: border-box;
  box-sizing: border-box;
  border-bottom: 5px solid #fff !important; 
  /* bottom:5px solid rgba(0,0,0,0); */
  cursor: pointer;
  background: #1a1a1b;
  }

不过，您可以通过简单地使用

来实现相同的目的

margin-bottom:5px;

然后删除：     margin：0！重要;

https://jsfiddle.net/u0macpe4/14/

Answer 4

您没有看到$conn = New-Object System.Data.SqlClient.SqlConnection $conn.ConnectionString = "Server=devsrv01;Database=TestDB;Integrated Security=SSPI;" $conn.open() $cmd = New-Object System.Data.SqlClient.SqlCommand $cmd.connection = $conn $cmd.commandtext = "INSERT INTO u_servicepreferences2 (productversion,fileversion,filename) VALUES() (Missing section here) $cmd.executenonquery() $conn.close() 的边界，因为您将rgba设置为0意味着看不见

请在opacity中将opacity:>0设置为白色，并使用rgba（根据需要选择(255,255,255,1)）

opacity

.menu-item {
  display: block;
  width: 100%;
  list-style: none;
  text-align: left;
  line-height: 20px;
  font-size: 13px;
  padding: 5px 10px;
  margin: 0 !important;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  //border-bottom: 5px solid transparent !important; 
  border-bottom:5px solid rgba(255,255,255, 0.9);
  cursor: pointer;
  background: #1a1a1b;
  color: #ccc;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: none;
}

注意！

如果不需要，请不要使用<ul class="menu"> <li class="menu-item">Disabled</li> <li class="menu-item">English</li> <li class="menu-item">German</li> <li class="menu-item">Spanish</li> </ul>：https://css-tricks.com/when-using-important-is-the-right-choice/

Answer 5

.menu-item {
  display: block;
  width: 100%;
  list-style: none;
  text-align: left;
  line-height: 20px;
  font-size: 13px;
  padding: 5px 10px !important;
  margin: 0 !important;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;

  border-bottom:5px solid white;
  cursor: pointer;
  background: #1a1a1b;
  color: #ccc;
  text-decoration: none !important;
  white-space: nowrap;
  box-shadow: none !important;
}

尝试